Related Clues:

• Sigmoid swimmers
• 'The Little Mermaid' baddies
• Sashimi fish
• Stunning swimmers
• Slippery sort
• Long-nosed swimmer
• Sniggling catches
• Fish lacking pelvic fins
• Epitome of slipperiness
• Thing in the sea
• Lithe swimmer
• Danger to divers
• Sniggler's prey
• Swimmer with a long snout
• Swamp ___ (predatory fish)